English

Variants of Baumgartner's Axiom for Lipschitz Functions on Baire and Cantor Space

Logic 2025-10-10 v1

Abstract

We consider several variants of Baumgartner's axiom for 1\aleph_1-dense sets defined on the Baire and Cantor spaces in terms of Lipschitz functions with respect to the usual metric. A variation of Baumgartner's original argument shows that these variants are consistent. However, unlike in the case of the classical BA\mathsf{BA}, we are able to give many applications for which the corresponding fact for linear orders is open. In particular we show that there are provable implications from the ωω\omega^\omega variants to the 2ω2^\omega variants and that some of these principles imply all the cardinals in the Cicho\'{n}'s diagram are large. We also show, similar to (but not the same as) BA\mathsf{BA}, that none of the Lipschitz variants follow from a large fragment of MA\mathsf{MA}.

Keywords

Cite

@article{arxiv.2510.07917,
  title  = {Variants of Baumgartner's Axiom for Lipschitz Functions on Baire and Cantor Space},
  author = {Corey Bacal Switzer},
  journal= {arXiv preprint arXiv:2510.07917},
  year   = {2025}
}

Comments

21 pages, 1 figure, submitted